77 lines
2.2 KiB
Go
77 lines
2.2 KiB
Go
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/*
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Translate file names for sharefile
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*/
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package sharefile
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import (
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"regexp"
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"strings"
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)
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// charMap holds replacements for characters
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//
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// Sharefile has a restricted set of characters compared to other
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// cloud storage systems, so we to map these to the FULLWIDTH unicode
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// equivalents
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//
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// http://unicode-search.net/unicode-namesearch.pl?term=SOLIDUS
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var (
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charMap = map[rune]rune{
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'\\': '＼', // FULLWIDTH REVERSE SOLIDUS
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'*': '＊', // FULLWIDTH ASTERISK
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'<': '＜', // FULLWIDTH LESS-THAN SIGN
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'>': '＞', // FULLWIDTH GREATER-THAN SIGN
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'?': '？', // FULLWIDTH QUESTION MARK
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':': '：', // FULLWIDTH COLON
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'|': '｜', // FULLWIDTH VERTICAL LINE
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'"': '＂', // FULLWIDTH QUOTATION MARK
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'.': '．', // FULLWIDTH FULL STOP
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' ': '␠', // SYMBOL FOR SPACE
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}
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invCharMap map[rune]rune
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fixStartingWithPeriod = regexp.MustCompile(`(/|^)\.`)
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fixEndingWithPeriod = regexp.MustCompile(`\.(/|$)`)
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fixStartingWithSpace = regexp.MustCompile(`(/|^) `)
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fixEndingWithSpace = regexp.MustCompile(` (/|$)`)
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)
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func init() {
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// Create inverse charMap
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invCharMap = make(map[rune]rune, len(charMap))
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for k, v := range charMap {
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invCharMap[v] = k
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}
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}
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// replaceReservedChars takes a path and substitutes any reserved
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// characters in it
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func replaceReservedChars(in string) string {
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// Names can't start with a period '.'
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in = fixStartingWithPeriod.ReplaceAllString(in, "$1"+string(charMap['.']))
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// Names can't end with a period '.'
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in = fixEndingWithPeriod.ReplaceAllString(in, string(charMap['.'])+"$1")
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// Names can't start with space
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in = fixStartingWithSpace.ReplaceAllString(in, "$1"+string(charMap[' ']))
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// Names can't end with space
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in = fixEndingWithSpace.ReplaceAllString(in, string(charMap[' '])+"$1")
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// Replace reserved characters
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return strings.Map(func(c rune) rune {
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if replacement, ok := charMap[c]; ok && c != '.' && c != '~' && c != ' ' {
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return replacement
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}
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return c
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}, in)
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}
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// restoreReservedChars takes a path and undoes any substitutions
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// made by replaceReservedChars
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func restoreReservedChars(in string) string {
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return strings.Map(func(c rune) rune {
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if replacement, ok := invCharMap[c]; ok {
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return replacement
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}
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return c
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}, in)
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}
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